Carriage-moving mechanism for typewriters and adding machines



Aug. 30 1927. 1 v F GLEIM 4 ,7 4

CARRIAGE MOVING MECHANISM FOR TYPEWRITERS AND ADDING MACHINES Filed March 19. 1927 I 2 Sheets-Sheet 1 Aug. 30, 1927. F GLEIM CARRIAGE MOVING MECHANISM FOR'TYPEWRITERS AND ADDING MACHINES Filed Mar'ch 19 1927 2 Sheets-Sheet 2 1 z WEE Mm ajrnl Patented Aug. 30, 1927.

UNITED STATES 1,640,764. ATENT' OFFICE.

IIEIEJRIIDINKNIII) GLEIM, OF'SEGIHLAIEII?HA'C 'SEN, SWITZERLAND, ASSIGNOR TO THE FIRE WALES ADDING MACHINE COMPANY, OF SCHAFFHAUSEN, SWITZERLAND.

CARRIAGE-MOVING MECHANISM FOR- TYPEWRITEBS AND ADDING MACHINES.

- Application'filed March 19, 1927, Serial No. 176,694, and in Germany April 20, 1925.

The present invention refers to improvements in carriage moving mechanisms or carriage return mechanisms for typewriters and adding machines. j

In such machines it has already been proposed to effect the drive by means of a continuously rotating electric motorv arranged at the machine frame and operatively connected to the carriage by means of a clutch arrangement including a reversing ge ar or a single or a two-fold cord transmission. These proposals have the drawback to cause vibrations and shocks of the machines if no special springs areprovided for cushioning shocks produced by the motor, further interruptions in the working by jamming or lost motion in the clutch device occur which detrimentally influence the degree of accuracy required with adding machines.

These drawbacks shall now be overcome by the subject matter of the present invention.

According to the present invention the movement is transmitted from a clutch device arranged in the center of the width of the machine frame to the carriage by means of a bipartite cord drive and in the latter a single spring tightened by the motor during the return movement of the carriage is j provided, said spring serving for movlng I the carriage during the calculating as well as for tightening the said cord and for damping the start of themovement of the carria e. 7

Pre erably the arrangement is such that at the machine frame a bevel wheel drive actuated b the driving motor by the intermediary o a jaw clutch is provided, and the cord of the bipartite cord drive being slung 4 around the driven bevel. wheel which encloses the actuating spring fixed to theaxle of the wheel, whereby the end of the part of the cord which is tensioned when the carriage moves forward is attached to anlarm 45. of a double armed lever mounted on the bevel wheel the actuating spring acting on the otherarm. i A constructional example of the subject matter of the present invention isillustrated on the accompanying drawings, in which: Fig. 1 shows in a side elevation a Wales adding machine, 2 shows on the same scale an end view of the carriage and of the driving device'seen from the right in Fig. 1,

Figs. 3, 4 and 5 show on a larger scale 7 the clutch device in particular,

Fig. 3 is a vertical section along llne III-III in Fig. 2,

Fig. 4 is a view of the interior of the spring casing and Fig. 5 is a horizontal section along line VV in-Fig. 3 through the clutch sleeve, Figs. 6 and 7 show on a larger scale and in a plan view and a side elevation respectively the key for operating the clutch.

In the drawing a Wales-adding machine of'the known type is shown and only those parts of this machine which are necessary for the comprehension of the present invention are illustrated.

At the rear part of the machine frame the guidance 1 of U-shaped crosssection is fixed, and on rollers provided in said guidance the carrier body 2 of the carriage W is slidable. The platen 3, the line spaclng mechanism, paper feed rollers and the like are provided on the carriage and are mounted directly or indirectl in the side shields 4 and 4? which seen cm the rear of the machine are situated to the right and to the left hand side of the carrier body.. Below the carriage and in the center of the machine frame the coupling. device K is arranged. From the rear of the machine frame a supporting pin 5 projects to which the bracket 6 is screwed. In the latter two axles 7 and 8 are mounted with their axes in alignment, which carry at their adjacent) ends parts 9 and 10 respectivel of a claw clutch. To the lower end of the axle 8 a worm wheelll is fixed which coo crates with a worm 12arranged on the sha of an electromotor adapted to drive the carrlage. On the axle 7 ,a bevel wheel '13 is secured which is inrmesh with a larger bevel wheel 14 forming the cover of a casing 15 containing the spring The spring casing 15 and bevel wheel 14: are rotatably mounted on the support pin .5 and the circumference of the casing 15 is provided with a' groove in which a bipartite cord 16 is housed. One part of the cord is fixed with its one end to the casing 15 and is then slung around the casing 15 and fixed with its other end to one end of the carriage, whilst the other part of the cord is fixed with its one end to the other end of the carriage and with its other end to one arm of a double armed lever 17 pivoted in the spring casing 15. To the other arm of the lever 17 the end of a powerful tensioned'spiral spring 18 is fixed andthe other end of the latter is secured to a disc 19 keyed to the pin 5.

' againstrotation by a key is provided with a circumferential groove 9 with which two rollers 20" arranged diametrically opposite each other in the coupling fork 20 cooperate (Fig. 5). An arm 20 extending in the upward direction is fixed to the fork 20 and is provided at its upper end with a pm engaging a slot of a swingably mounted member 22, the latter occupies the pos1t1onshown in Fig. 3 when the jaw clutch is disengaged and is inclined by the same amount towards the other side of the vertical when the jaw clutch is in engagement, a laterally arranged tension spring'23 (Fig. 1) causes the member 22 to be suddenly and powerfully displaced and to occupy one or the other inclined position in which .it is uously and strongly against the member 22.

held by stops. A tension spring 24 causes the arm 20 with its pinto bear contin- The latter is provided with an abutment .face 22 arranged at an angle of 45 to the lateral shanks; a pressure or impact in the direction of the pivot of the member causes the latter to be displaced from its left-hand position in which the clutch 9, 10 is engaged to its right-hand position whereby the clutch is disengaged. The disengagement of the clutch occurs thus automatically. To this end a rod 25 is mounted in the longitudinal direction of the carriageon which an adjustable stop 26 is provided, whilst the right hand supporting arm of 'the rod 25 serves as a fixed stop 27 similar to stop 26' and being also provided with a facing 26 slanting at 45 and being parallelto the facing 22 of the member 22 and'projecting. into the path of the latter facin whereby when. the'carriage moves towards the left (looking at the back. of the machine) the facing 26 contacts with the facing 22? and displaces the member 22 and disengag'es the clutch. The clutching of the clutch is performed by hand by means of a key 28 proecting in front of the machine. This key -1s operatively connected to the clutch fork 20 "by means of a connecting rod 29, double armed lever .30, rod 31 and -m21.

In order to prevent ,that a prolonged presthrough which the pins 33 pass, is guided.

The angular piece 32 is provided at its upper edge with a raised portion and an ascending part and the sliding piece is provided with a tooth 34 arranged at the same height as the ascending part. To the lower part of the sliding piece 34 the rod 29 is linked, Whilst to the front part of a support 36 for pawls, displaceabl arranged between the sliding piece 34 and the angular piece 32, the key 28 is fixed. On the support 36 the pawl 37 is pivoted at 36 which projects by means of a cross-member 38-over the sliding piece 34 and the pawl 37 is provided with an arm with which a tension spring 39, that is fixed at its other end, is connected. Atensioned spring 40 keeps'the key 28 in its position of rest at a distance from the machine casing. If'the key is depressed in order to cause a moving of the carriage towards the right the pawl 37, 38

bears against the tooth 34 and displaces the sliding piece 34 towards therear, whereby the rod29 effects the engagement of the clutch K. Thereby the pawl 37 moves up the ascending portion on to the higher edge of the stationary angular piece 32 out of engagement with the tooth 34 and the rod 29. The automatic disengagement of the clutch may occur at any moment, even if the key 28 is kept depressed in that moment as the sliding piece 34 which moves inthe forward direction has its movement not objected to.

The manner of operation of the above described device is as follows:

When the key 28 is depressed the clutch IQ is engaged and by means of the bevel gear drive 13, 14, double armed lever 17, spring 18 and cord 16 the carriage as pulled towards the left (i. e. towads the right when looked at by the operator), until the clutch is disengaged by the abutment against the stop 16 and the carriageis arrested. There'- by the spring 18 has been tensioned-so that it moves the carriage towards the left (seen from the operators place) in a step by step *is saved. Simultaneously the arrangement of the double armed lever 17 causes the right hand part of the cord 16 (seen from the back) to be always kept under tension,

whilst the left hand part of the cord is also tensioned by the spring tending to pull the carriage towards the right.

In order to arrest the movement of the carriage in determined positions corresponding to the desired columns between the side shields 4 and 4 a so-called stopbar is provided, i. e. a bar 41 provided with screw thread, on which steps 42 displaceable according to the desired stopping posi tions are screwed, the stops being adapted to cooperate witha catch on the carriage. At the guide part 1 of the carriage frame a slide 43 adapted to be vertically displaceable is provided on which the catch 44 is pivoted and held in an initial position by the action of a tension spring 45 and having an extension 44 resting against an abutment 46 where its nose 44 abuts'against a stop 42. The slide 43 is provided with an extension 43 projecting in the downward direction and caring with its end against a roller 47 by the action of a spring 48. The roller 47 is mounted on an arm 47 which is arranged.

on an axle 49 mounted on the guide part 1, the gear of the machine cooperating in a known manner on an arm 50 fixed on the axle 49, whereby an upward and downward movement of the slide is effected. When the slide is moved in this manner in, the downward directionthe catch 44 leaves the stop the slide so that the carriage remains further arrested until an entry or an addition in the respective column has been made, whereupon the gear of the machine moves the slide 43 in the upward direction so that the carriage is now free to move until it is retained by a stop corresponding to the next column whereupon the same procedure is repeated. If new the line-spacing of the platen has to be operative this is effected by preventing the downward movement ofthe slide 43. To this end a longitudinally displaceable catch 51 is arranged on the lower guide cheek 1 the nose 51 of which locks the slide 43 in its upper position. The catch 5 1 is provided with an extension 51*" and a pin with which a .forked arm 52 of a bell crank lever cooperates, the other arm 52 of the bell crank lever carrying at its free end a pin with which a lever 53 cooperates (Fig. 11). This lever 53 is turned by means of connecting rods 55 by the key 54 and a turning ofthe catch is caused thereby. v

i The key 54 is situated above the key 63 for cutting in and out the current. A pressure on the key 54 depresses also the key 63; the machine is thereby rendered operative, however a sudden movement of the carriage into the next column is prevented and aline spacing of the aten occurs.

To this end the 118113]. pus er pawl 56 is provided on the carriage which cooperates 42 and rests instead on the nose 43 of with the line spacing ratchet wheel 57 and turns the platen by one tooth by means of the known ratchet mechanism (Figs. 9 and 10) which is not describedin detail. The line spacing has not to beoperative when the carriage suddenly moves from one column into the next 'which is obtained by bringing'the pusher pawl 56 out of engagement with the ratchet wheel 57. A pin 58 is provided on the pawl 56 with which the tongue 59 of a plate 59 cooperates. The latter is fixed to the end of a bar 60 of angular cross-section displaceably mounted between the shields 4 and 4 and is displaced by a cam 43 when the slide 43 is moved. in the'downward direction whereby the tongue 59 is so turned that the pawl 56 is brought into the position shown in chainturning the stop bar 41 by means of the key I 61, on which the bar is mounted, whereby the stops 62 are moved out of the path of the catch 44.

If it is intended to have the slide 43 locked in the same column for a continued addition the catch 51 is locked by means of a special locking member 62 at the rear side of the lower guide check 1, the catch 51' bearing on the nose 62 of the locking member.

I'claim:

1. Carriage moving mechanism for typewriters, adding machines and the like, comprising in combination, a continuously rotating electric-motor and driving connections between said motor and'the carriage including a clutch, a bipartite cord and a spring interposed in said two parts of the cord and adapted to tension said cord drive and to cushion shocks in the starting movement of the carriage.

2. Carriage moving mechanism for typewriters, adding machines and the like, comprising in combination, a continuously r otating electric-motor, and driving connections between said motor and the carriage including a clutch, two cooperating bevel wheels, a spiral spring operatively connect- ,ed on said bevel wheel.

3. Carriage moving mechanism for typewriters, adding machines and the like, com: prising in combination, a continuously rotating electric motor, and driving connec- Wheel is constructed as a casing, an axle about whichsaid driven wheel is turnable, a spiral sprlng' enclosed 1n sa1d caslng, a

two-armed lever'fulcrumed on said casing,

one end of said spring being connected .to said axle and the other end being connected to-one arm of said lever, a cord passing around said casing and having one end fixed to the latter and the other end fixed to the carriage, another cord passing around said casing and having one end fixed to the other arm of said lever and the other end to said casing.

- 4. Carriage moving mechanism for type- V Writers, adding machines and the like, comprising in combination, a continuously rotlons between said motor andv the carriage tating electric-motor, and driving connections between said motor and the carriage including a clutch, a fork cooperating with said clutch for engaging and disengaging the latter, a rocking member operatively' connected to said fork for operating the latter and provided with an inclined abutment facing, a trip member displaceably fixed on the carriage and having a corre sponding shaped abutment facing cooperating with the first mentioned facing for causing a disengaging of the clutch, and a bipartite cord and a spring interposed in said two parts of the'cord and adapted to ten; sion said cord drive and to cushion shocks in the starting movement of the carriage.

name to this specification.

. FERDINAND GLEIM.

' In testimony whereof, I have signed my 

